Spade type boring bit



FIG. 1 is a front view of a spade type boring bit;

FIG. 2 is a left side elevation view of the spade type boring bit shown in FIG. 1;

FIG. 3 is a top plan view of the spade type boring bit shown in FIG. 1; and,

FIG. 4 is a bottom plan view of the spade type boring bit shown in FIG. 1.

The broken lines in the drawings depict unclaimed environmental subject matter. 

The ornamental design for a spade type boring bit, as shown and described. 